Improvement in tube-thread protectors



J. M00. LOPER. Tube-Thread Protectors.

NO. 222,920. Patented Dec. 23, I879.

min/asses Q4 NFETERS. PHOTO LlTHOGRAPHEfi. WASHINGTON. D C.

UNITED TATE Parana Futon JONATHAN M00. LOPER, OF PITTSBURG, PA., ASSIGNOR 011 ONE-HALF OF HIS RIGHT TO DANIEL F. ,OALMUS. OF SAME PLACE IMPRCVEMENT IN TUBE- THREA'D PROTECTORS.

Specification forming part of Letters Patent No. 222,926, dated December 1679;

application filed- October 18, 1879.

To all whom it may concern: 7

Be it known that I, JONATHAN MOD. LOPER, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Tube-Thread Protectors; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawing. whiclrforms part of this specification.

My invention relates to an improvement in tube-thread protectors; and it consists in aring made of suitable elastic material, inclosed in a metallic shell, by which it "is protected,-

the said ring to be screwed upon the thread on the tube, covering the same and preventing injuryv during transportatiolnas will be' merc fully described hereinafter.

The aceom pan yin g drawing; represents a longitudinal section of'niyinvention.

A represents a metallic pipe having a screwthre'ad formed on theoutside of its end. If this thread'is left unprotected during transportation it is'almost sure to be so battered and injured as to necessitatereeut-tiug before thescrew is fitfor use. In order'to form a protector for this thread a cylinder, B, is made from paper or some soft tough material, which can be screwed on the end of the pipe, either the full length of the thread, or just far enough up to protect that part of the thread which is to be brought into actual use.

5W here the pipe is small, or the screw very short, the cylinder B alone maf' be used; but

her, 1879.

where the pipe is'large the cylinderisinclosed in a sheet-metal cover, 0. This cover gives additional strength to the cylinder, and protects .it from being cut orinjurd. This cover may be turned down at its outer end over the end of the cylinder, as shown; necessary.

Heretotore Wood has been used to protect the screws; but the great trouble with it is that 'itsplits whenever the ends of the pipe are struclt'or are dropped, and it warps and cracks from the heat, and had to be abandoned as impracticable.

(here the cylinders are made from paperpulp and compressed to a suitable hardness,

but this is not theycan be screwed upon the pipe, where they stick so tightly that they can only'be removed by the application of considerable force, and then can be used again andagain.

Having thus described my invention, 1 claim- 1. A screw-thread protector, to be applied to the outside ofthe end of a pipe, that is made of paper 01'; similar material, substantially as shown,

2. A tube-protectorconsistingotla cylinder, B, made of a'sott tough material and inclosed in a metallic cover, (3, substantially as described.

In testimony that I claim the foregoing I hereunto set my hand this 12th day of (low- JONATHAN M00. LOPER. Witnesses:

' T. 'F. LEHMANN,

SAML. DIESCHER. 

